Analysis of LoRa Transmission Distance and Data Test in Low Bit Rate Spread Spectrum Communication

In view of LoRa low bit rate spread spectrum communication, this paper first analyzes the spatial transmission of wireless communication, and analyzes the relevant factors of transmission distance in the transmission process. Firstly, the influencing factors of distance of receiving and transmitting antennas are analyzed, including the transmitting power of the transmitter, the sensitivity of the receiver, the gain of the transmitting antenna, the gain of the receiving antenna, the carrier frequency, the insertion loss of the base station's transmitting antenna's feeders and the air transmission loss caused by the environment in the ideal environment. Thus, a theoretical analyzation about influencing factors of the transmission distance is acquired. The basic principle of LoRa spread spectrum communication is analyzed and compared with FSK modulation. Finally, through a large number of tests, transmission distance, packet loss rate, signal quality, signal-to-noise ratio index are analyzed, and the comparison results between the actual measurement and the theory are obtained.